Harrassment of clients for upgrades

I am peeved off to the extreme. Our contracts are running out and we are receiving numerous calls on upgrading, I answered three of these calls (the rest I ignored) and I told three different operators that I do not want to renew my contract, I do not want anything else added or extended or whatever, I only want to keep my number. I am a teacher, so answering these calls during the day is nearly impossible and it also is wasting my time. We made the effort to go in to a store to also make this known and we were chased away when they made the mistake of calling the incorrect person, we had a sick 2 yr old with us as well and I ended up leaving because filling out paperwork because I do not want a contract is wasting time. If a contract gets renewed they want to quickly do it over the phone so why is the phone calls and answers not sufficient. Not only that but there was a price increase as well lately, for what, no-one knows. These are the little things that make a huge difference if and when we decide to upgrade again.